Description Bonnie's father is an engineer for the Apollo 11 space mission. Bonnie is an engineer too, developing a model rocket that she plans to shoot high into the sky. While Baba works on the moon-landing module far away, Bonnie designs, builds, and tests her own project -- with sometimes disastrous results! Throughout the process, Baba's letters encourage her in her work, and after the astronauts return from the moon, Baba comes home in time to see Bonnie launch her amazing rocket.